Here is the deal, I know a MAF relocate is one of the things a lot of folks do to run a 100% vent BOV on their MSP. This is obviously not new, peeps have been doing it for years. My question is based off something I read on a certain vendors website... it reads "We do not know the long term effects of relocating your MAF Sensor so do it at your own risk." This leads me to believe that there could be some adverse effects after a long period of time. I don't know how it could possibly hurt the motor as the MAF simply meters the air so the ECU knows how much fuel to spew! Any of those out there running this for a year or longer with any issues? Anyone had issues? Just looking for any feedback or valid reason why this disclaimer was given on that website.(attention)
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Calling out all MAF relocators
- Thread starter Arok22
- Start date
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
Keep the MAF 6 inchs away from the TB and the BOV on each side and you will be golden. I dont know anyone who has had one go bad from relocating it.
Bassmachine
Member
They say these things....they don't mean it.
Metallic36
Member
- :
- 2003 Mazda6 3.0L Speed Yellow
Soo.. if they don't know the long-term effects, how does that lead them to believe it is harmful? I've had mine relocated, no issues ever.
HondaEat-R
Member
They say there might be issues because this is not how cars come from the factory, therefore they can't condone you going against "the norm". MAFs were not made to see positive pressure, as there are delicate circuits and boards inside. With that said, I also run a "blow through" MAF setup, and haven't had any issues that I'd attribute soley to the MAF being moved. I have done this on my SR20's for the past 10 years, and it works fine....in my experience.
Regardless, the more I look at what I'm / We're doing, it is kind of silly, and is really just to have the "Phhssshh" BOV noise. I'll probably go back to a draw through set-up soon, just to nore the differences that may occur. Running a BPV is really the proper way, as it helps spool the turbo faster between shifts AKA less lag.
Regardless, the more I look at what I'm / We're doing, it is kind of silly, and is really just to have the "Phhssshh" BOV noise. I'll probably go back to a draw through set-up soon, just to nore the differences that may occur. Running a BPV is really the proper way, as it helps spool the turbo faster between shifts AKA less lag.
mazdaspeed41
Member
Question?.. I have a FMIC and a RDV(replaced the stock BPV) will relocating the MAF help with hesitation(on stock PSI)? Also no Engine management...
Thanks
Thanks
harrisonchang
Member
No. hesitation should stay generally the same.
I've had mine relocated for about 3000 miles, no problems.
If you want your system to last long, don't let your bov vta.
I've had mine relocated for about 3000 miles, no problems.
If you want your system to last long, don't let your bov vta.
If you are saying never to run the system on 100% VTA (vent to atmosphere.. for those not good with ebriviations) Then what is the point of even relocating the MAF? Essentially there are no performance gains. It makes sense that the MAF was never designed to see positve pressure, so I can see the MAF breaking over time, but I cannot see any other draw backs. One thing that does keep coming to my mind is that all the great turbo car producers (Mistu, Mazda, VW/Audi, etc) all run recirc valves/ BPV on their cars. I would imagine that if there was significant performance issues at hand, these cars makers would change their BPV systems. I'm sure it is not lazy design. Personally, I like the sound of a BOV... its sexy. I just wanted to know if anyone running a relocated MAF long term had any issues. If you are against relocating your MAF, what are you factual performance impacts that keep you from changing it up? Leave the butt dynos out, factual evidence to each method rather than personal preferences.(dunno)
If you want your system to last long, don't let your bov vta.
harrisonchang
Member
They all recirc because it's healthier for your car. If you go vta, it's just for the sound, there are no performance gains. However, it does release a lot of air reducing precious pressure that can be used for other things.
The BPV feeds the unused pressure into the intake to keeep it pressurized, keeping cylinders pressurized with air which helps push exhaust out.
BOV throws away extra air, BPV uses it to it's advantage.
The BPV feeds the unused pressure into the intake to keeep it pressurized, keeping cylinders pressurized with air which helps push exhaust out.
BOV throws away extra air, BPV uses it to it's advantage.
What about totally removing it? can you get away with it?
The only way to get around not having a MAF is to use a standalone ECU system etc. I know Darrin at Corksport used to rock a standalone on his protege with no MAF.
They all recirc because it's healthier for your car. If you go vta, it's just for the sound, there are no performance gains. However, it does release a lot of air reducing precious pressure that can be used for other things.
The BPV feeds the unused pressure into the intake to keeep it pressurized, keeping cylinders pressurized with air which helps push exhaust out.
BOV throws away extra air, BPV uses it to it's advantage.
I totally dig this! Relocating the MAF... This makes sense and for those whom love the sexy sound of pppsssssshh! It is great! When the MSP recircs its air, it puts it right back into the turbo... keeping it spooled/pressurized. I know we all like to kill the turkey (especially this time of year! (gun)) but the choice is completely left up to personal preference. I really liked the Forge piece I had on my last MSP.. It was a dual vent and I know that Turbosmart makes a nice peice that does both recirc and to atmos. This could be the happy medium for all!!
in the end it is a prefrence thing thats forsure, although bovs tend to have larger inlet and outlet so at higher boost levels it can release more pressure instead of gettin some surge, the largest bpv ive seen is the boostsciences at 1" in and out (also what i have) most bovs are 1.25. as for healthier i am sure its up for discussion . as for relocated maf im sure another reason they dont know long term affects is because the maf is now under pressurized conditions so it potentially could cause more wear and tear but i have not heard of that being a huge issue so far.
harrisonchang
Member
if you can get a good tune.
HondaEat-R
Member
Running a relocated MAF also allows you to drive home (usually) if you blow an intercooler pipe, you just won't have any boost. If the IC pipe / coupler blows off behind the MAF, then you're s*** outta luck. But being able to limp home NA is a plus of running relocated MAF. When this happens with a Draw-through set-up, the MAF goes crazy and the car become undriverable. You're right though, no car maker ever produced a blow-through MAF system, which does say something... I've run a blow through MAF on several cars, and never had a problem, but there is a lot to be said about Draw through being the set-up that is manufactured ALWAYS. Like I said, I'll lilkely switch soon.
If you are saying never to run the system on 100% VTA (vent to atmosphere.. for those not good with ebriviations) Then what is the point of even relocating the MAF? Essentially there are no performance gains. It makes sense that the MAF was never designed to see positve pressure, so I can see the MAF breaking over time, but I cannot see any other draw backs. One thing that does keep coming to my mind is that all the great turbo car producers (Mistu, Mazda, VW/Audi, etc) all run recirc valves/ BPV on their cars. I would imagine that if there was significant performance issues at hand, these cars makers would change their BPV systems. I'm sure it is not lazy design. Personally, I like the sound of a BOV... its sexy. I just wanted to know if anyone running a relocated MAF long term had any issues. If you are against relocating your MAF, what are you factual performance impacts that keep you from changing it up? Leave the butt dynos out, factual evidence to each method rather than personal preferences.(dunno)
So to run a MAF on a turbo car you either need to recirc some of your venting back to the open side of the sensor on a drawthru or run it just a few inches both from the TB and from the BOV?
Other than the VTA for the blowthru and the limp home with the draw thru, what are other pro's and con's of running it either way?
Other than the VTA for the blowthru and the limp home with the draw thru, what are other pro's and con's of running it either way?
When it comes or beloved MSPs, the blow through setup is ideal on a stock ECU/piggy back setup. The car becomes smoother throughout the rev range, the factory 4k rpm "hesitation" is gone, and you gain a few hp (dyno measured). Kooldino and I had a chance to dyno a blow through and a pull through setup back to back and saw a 3 whp gain just from switching to a blow through setup.
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